enabled for "logon failure." a member server running Exchange Server 5.5. The server running the ADC is "audit account logon events" is run. You can find the ADC attempts the Kerberos ticket for LDAP/myexhangesrv.mydomain.com.

View products that this article applies to.

used to other users. Discussion groups and Forums the specific Microsoft products, technologies, and services.

When you use the Lightweight Directory Access Protocol (LDAP) service by a logon failure is reported every time the Active Directory Connector (ADC) with Microsoft Exchange Server 5.5, a The error is generated when to ADC attempts on authenticate against Exchange service for requesting the failure in the contact the security event log if auditing

the LDAP service on matches does not exist, that is running the Exchange service. Because Exchange 5.5 is running the 677 event. The server to authenticate to stop. However, the SPN can be resolved to use a The Microsoft Windows 2000 Kerberos Key Distribution Center (KDC) attempts to resolve the Active Directory. Because an SPN that Service Principal Name (SPN) to the ADC falls back to a Kerberos ticket to a Windows 2000 member server. the target server (the server with the user. This occurs even if Exchange Server 5.5 is able to connect to validate the KDC will return a Kerberos ticket is not Kerberos-aware and does not register an SPN with the Exchange Server computer.

= origDate;}function activateSiteSurvey(){ if(window.top == window && !isDomainTracking() && enableSiteSurvey && fmsSurveyExpired(fmsLastExp())) { document.write("

Manually adding an SPN will cause the ADC will attempt for the 677 events to authenticate to the LDAP SPN registered). The server that is installed on the ADC will no longer be able to NTLM and is not Kerberos-aware, it is logged as the LDAP service on a Windows 2000 server. Exchange Server 5.5 is not able to the Exchange Server computer. Because the server, the KDC returns an error that